142154-46-9 17-EDDA-butenoate 17-Ethynyl-4-estrene-3,17-diol-3-acetate-17-(3'-acetoxy-2'-butenoate) 19-Norpregn-4-en-20-yne-3,17-diol, 3-acetate 17-(3-(acetyloxy)-2-butenoate), (3beta,17alpha,17(Z))- E(-)-17-Edda-butenoate Z(-)-17-Edda-butenoate